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(No Model.) 2 Sheets-Sheet 1. T. H. BONHAM.

, SASH BALANCE. No. 257,142. Patented Apr.25. 1882.

WITNESSES INVE/VTUR PEYERS. Phokoiilhogmphcr. Wmhinglcm u. a

15 my invention.

UNITED STATES THOMAS H.

BONHAM, OF GRAND RAPIDS, M1OHIGAN,ASSIGNOR OF ONE HALF TO WILLIAM F. HARTWIG, OF SAME PLACE.

SASH-BALANCE.

SPECIFICATION forming part of Letters Patent No. 257,142, ,dated April 25, 1882.

Application filed November 4, 1881.

To all whom it may concern Be it known that I, THOMAS H. BONHAM, of Grand Rapids, in the county of "Kent and State of Michigan, have invented an Improve- 5 ment in Sash-Balances and Window-Frames,

of which the following is a specification.

The objects of my invention are to render the operation of sash-balances more simple and efficient, to arrange the operative parts so .-0 that they can be easily inspected, adjusted, and repaired by inexperienced persons, and to add as essential features of the combination highly ornamental parts of a window-frame.

Figure l is a perspective. view, in detail, of

Fig. 2 is a front elevation, representing the cords concealed by a removable top, and showing the tubular boxes for the weights; and Fig. 3, a plan view of one of the boxes for holding the weights.

20 A represents a common solid window-frame,

and S S a pair of ordinary sashes.

G 0 represent hollow ornamental weightboxes, one on each side and to the front of the window, in which the weights W move. In

2 Figs. 1 and 2 these weight-boxes are broken away to show the position of the weigh ts there- 1n.

D is an ornamental removable front top attached to the upper part of the window-frame.

. 0 The weight W may be provided with a pulley, as shown by I, over which the cord passes when the sash is raised by a cord attached to each side, as shown in the drawings.

B B are two pulley-blocks, each so made as 5 to receive two cords. The cord B, after pass- (No model.)

backward over pulleys P and P, and thence downward and is attached to sash S. Thus by one weight sash S is heldin balance. The attachment of the cord to S is preciselythe same as attachment to sash S above described.

The boxes or ways, when used, may be each provided with grooves G G, (shown in Fig. 3,) which guide the weight IV, so that in raising and lowering the sash it cannot shake or rattle.

Instead of having the boxes 0 G placed on the outside of the window, they may, if desired, be set into the casing so as to present no projection, the cover or removable strip being flush with the window-frame and ornamented. The ornamental weight-boxesare detachable as wellas the ornamental top, and, being thus detachable and removable, access is easily had to the cords and weights at anytime, so that they can be easily inspected,adjus ed, or repaired by any one without recourse to a skilled mechanic.

The ornamental top is used whether the cords and pulleys are arranged above or below the top of the window-frame, and the use of said top is also highly advantageous as or in connection with a lambrequin.

Having thus described my invention, what I claim, and desire to secure by LettersPatent,

In a window-frame, the ornamental removable top and detachable hollow weight-boxes, in combination with the sash-balancing cords and pulleys arranged behind said removable top and directly on and across the surface of the top of the window-frame, substantially as described.

'TIIOS. H. BONHAM.

Vi tnesses:

EDWARD TAGGART, FRED W. STEVENS. 

